| Qinghai province hutouya polymetallic ore beds in the east kunlun mountains qimantage early Paleozoic magmatic arc and the qimantage early Paleozoic combine,experienced the early Paleozoic and early late Paleozoic-ozoic compound orogeny,development of magmatism and mineralization,the metallogenic conditions is superior.It's in qimantage area one of the Significant deposits of ore-prospecting results,by the early exploration work,in hutouya area preliminary delineated the eight ore belt and many mineralization points,among of the No.?,?,? ore belts for contact metasomatic skarn type,and the No.IV,?,?,?,? ore belts are hydrothermal vein type or stratabound hydrothermal superimposed type,the circle in total 61 ore bodies in the ore belt,preliminary estimates there are 920000 tons of lead and zinc resources,iron ore 3.8 million tons,6500 tons of tin.In general the engineering degree is higher,but the comprehensive research degree is not enough,genesis of ore deposits is very complicated,there are still controversial.In this paper,have clear understanding of polymetallic ore deposit geological characteristics of the Hutouya,dtermine its genesis,thus will help to make guidance area similar causes disputes on deposit.In this paper,the history of tectono-magmatic evolution of regional structure and related diagenetic deposit-metallogenic age combined dscuss the structure of the deposit environment.Through the detailed observation of strata,fracture system and in combination with ore deposit geological characteristics,dmonstrate Hutouya polymetallic deposit ore-forming conditions,ore-controlling factors and metallogenic mechanism,through mine geology,ore deposit geology,and other aspects of comprehensive study,clarify deposit genetic types,pospecting model is established.Based on a lot of field and indoor researches,the results obtained from the Hutouya polymetallic deposit in this paper as follows:(1)Indosinian period is mainly magmatic activity in the region,Zircon U-Pb dating of porphyritic adamellite:232.7±1.8 Ma,Represents the crystallization age of magma and metallogenesis.(2)Ore ? 34S lies between 0.97 ‰ and 8.3‰,and the same minerals of ?34S range is larger,Hints sulfur source for shell source and mantle source two kinds,Magmatic hydrothermal ore-forming hydrothermal mixed with the deep circulation of groundwater in different degree(3)Hutouya polymetallic ore beds is controlled by fault and magmatism,which the provenance is magma and strata,which the main heat source and the magma hydrothermal water are magma,which the fault is the hydrothermal migration channel.Hutouya polymetallic ore beds is a typical skarn type ore body and hydrothermal vein type ore body of magmatic hydrothermal deposit.The hydrothermal vein type product in the fault fracture zone and in the interlayer fracture zone,Composition the skarn type and hydrothermal vein type more metal(Fe-Cu-Pb-Zn)metallogenic series.(4)Analyzed the prospecting potential in the region,think ? ore belt south between ? ore belt,? south,?,?,Vbetween ore belt has further looking for hydrothermal vein type ore prospects. |
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